background color and text direction

[pgundlach]

<?xml version="1.0" encoding="UTF-8"?>
<Layout xmlns="urn:speedata.de:2009/publisher/en"
    xmlns:sd="urn:speedata:2009/publisher/functions/en">
    <Pageformat height="5cm" width="5cm" />

    <LoadFontfile mode="harfbuzz" name="FB-REGU" filename="ezra_sil.ttf" />
    <DefineFontfamily name="text" fontsize="8" leading="15">
        <Regular fontface="FB-REGU" />
    </DefineFontfamily>
    <DefineFontfamily name="FF-Bnum" fontsize="8" leading="15">
        <Regular fontface="sans" />
    </DefineFontfamily>

    <Stylesheet> .bg { background-color: #E0E0E0; } </Stylesheet>

    <Record element="data">
        <Output >
            <Text>
                <Paragraph bidi="yes" direction="rtl">
                    <Span class="bg">
                        <Fontface fontfamily="FF-Bnum">
                            <Value>6</Value>
                        </Fontface>
                    </Span>
                    <Span class="bg">
                        <Value>יהוה</Value>
                    </Span>
                </Paragraph>
            </Text>
        </Output>
    </Record>
</Layout>

gives

Background should extend to the rtl text.